Tri-o-tolylphosphine → N-(3-(3-(3-ethyl-3-hydroxypentyl)phenyl)propyl)-2,2,2-trifluoroacetamide

HRID 2172734Notes

Reaction equation

HRID 2172734 reaction equation
Br[C:2]1[CH:3]=[C:4]([CH2:8][CH2:9][CH2:10][NH:11][C:12](=[O:17])[C:13]([F:16])([F:15])[F:14])[CH:5]=[CH:6][CH:7]=1.[C:18]([C:20]([OH:27])([CH2:24][CH2:25]C)[CH2:21][CH2:22]C)#[CH:19].CC1C=CC=CC=1P(C1C=CC=CC=1C)C1C=CC=CC=1C>C(N(CC)CC)C.CN(C=O)C.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.[Cu]I>[CH2:18]([C:20]([OH:27])([CH2:24][CH3:25])[CH2:21][CH2:22][C:2]1[CH:3]=[C:4]([CH2:8][CH2:9][CH2:10][NH:11][C:12](=[O:17])[C:13]([F:16])([F:15])[F:14])[CH:5]=[CH:6][CH:7]=1)[CH3:19]

Participants

8

Reactant 3

HCID 80271Tri-o-tolylphosphineHCID 123838984-Ethynylheptan-4-olHCID 57608389N-(3-(3-bromophenyl)propyl)-2,2,2-trifluoroacetamide

Product 1

HCID 86628449N-(3-(3-(3-ethyl-3-hydroxypentyl)phenyl)propyl)-2,2,2-trifluoroacetamide

Reagents, catalysts & solvents 4

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 6228DimethylformamideSolventHCID 8471TriethylamineSolvent

Conditions

Temperature
90 °C

Procedure

To a degassed solution of N-(3-(3-bromophenyl)propyl)-2,2,2-trifluoroacetamide (10) (2.29 g, 7.4 mmol) and 4-ethynylheptan-4-ol (2.4 g, 18.5 mmol) in triethylamine (2 mL) and DMF (18 mL) was added PdCl2(PPh3)2 (0.130 g, 0.185 mmol), P(o-Tol)3 (0.113 g, 0.37 mmol), and CuI (0.070 g, 0.37 mmol). The resulting mixture was degassed and stirred under argon at 90° C. overnight. The mixture was cooled to room temperature and the solids were removed by filtration through Celite. The filtrate was partitioned between diethyl ether and water and the combined organics were washed with brine, dried over Na2SO4 and concentrated under reduced pressure. Purification by flash chromatography (6 to 50% EtOAc-hexanes gradient) gave N-(3-(3-(3-ethyl-3-hydroxypentyl)phenyl)propyl)-2,2,2-trifluoroacetamide (12) as an amber oil. Yield (2.6 g, 95%): 1H NMR (400 MHz, DMSO-d6) δ 9.40 (s, 1H), 7.18-7.29 (m, 4H), 3.16 (q, J=7.2 Hz, 2H), 2.56 (t, J=7.2 Hz, 2H), 1.76 (quint, J=7.2 Hz, 2H), 1.53-1.67 (m, 8H), 0.97 (t, J=7.2 Hz, 6H).

Workup

  1. customThe resulting mixture was degassed
  2. temperatureThe mixture was cooled to room temperature
  3. customthe solids were removed by filtration through Celite
  4. customThe filtrate was partitioned between diethyl ether and water
  5. washthe combined organics were washed with brine
  6. dry with materialdried over Na2SO4
  7. concentrationconcentrated under reduced pressure
  8. customPurification by flash chromatography (6 to 50% EtOAc-hexanes gradient)

Sources & evidence

ORD record
ord-12cfd32ce3aa4e5f93428fe69ebbf67f
Source dataset
uspto-grants-2015_06
Patent number
US09056849B2

Reaction notes

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